好词典

impulse

UK /ˈɪmpʌls/US /ˈɪmpʌls/

词源

源自拉丁语 'impulsus',意为‘推动’或‘驱使’,由 'in-'(向内)和 'pellere'(推动)组成。

noun

❶ 一种突然的、强烈的欲望或冲动,通常难以控制,促使人们立即采取行动。

“She felt an impulse to buy the dress even though it was expensive.”

(她突然有种冲动想买下那条裙子,尽管它很贵。)

“He acted on impulse and quit his job without thinking.”

(他一时冲动,没多想就辞职了。)

❶ 物理学中指力的短暂作用,通常表现为物体动量的变化。

“The rocket's engines provided the necessary impulse for liftoff.”

(火箭引擎提供了起飞所需的冲力。)

“A sudden impulse from the collision changed the car's direction.”

(碰撞产生的突然冲力改变了汽车的方向。)

同义词:urge, drive, compulsion

verb

❶ 推动或促使某人做某事,通常指突然或强烈的动机。

“His curiosity impulsed him to open the mysterious box.”

(好奇心驱使他打开了那个神秘的盒子。)

“Fear can impulse people to make irrational decisions.”

(恐惧会促使人们做出不理性的决定。)

同义词:drive, motivate, propel

常见短语

on impulse — 指未经深思熟虑,因一时冲动而做出的行为或决定。

“He bought the expensive watch on impulse.”

(他一时冲动买下了那块昂贵的手表。)

impulse buy — 指未经计划,因一时冲动而购买的商品。

“The candy near the checkout counter is designed to encourage impulse buys.”

(收银台附近的糖果是为了鼓励冲动消费而设计的。)